Methods for privacy protection using coordination of initial connection release during relay reselection

Abstract

In an implementation, a second device, for example a second WTRU, may receive a Link Modification Request (LMR) message from a first device, for example a first WTRU, via a first relay. The LMR message may include one or more new MSBs for a new Key NR ProSe identifier (KNRP ID). The second WTRU may send a link modification accept (LMA) message to the first WTRU via the first relay. The LMA message may include one or more new LSBs for the new KNRP ID. The second WTRU may form the new KNRP ID by combining the one or more new MSBs with the one or more new LSBs and replacing an existing KNRP ID with the new KNRP ID. The second WTRU may also receive a direct connection request (DCR) message from the first WTRU via a second relay. The DCR message may include the new KNRP ID.

What is claimed: 
     
         1 . A method implemented by a second wireless transmit receive unit (WTRU), the method comprising:
 receiving a Link Modification Request (LMR) message from a first WTRU via a first relay, wherein the LMR message includes one or more new most significant bytes (MSBs) for a new Key NR ProSe identifier (KNRP ID);   sending a link modification accept (LMA) message to the first WTRU via the first relay, wherein the LMA message includes one or more new least significant bytes (LSBs) for the new KNRP ID;   forming the new KNRP ID by combining the one or more new MSBs with the one or more new LSBs and replacing an existing KNRP ID with the new KNRP ID; and   receiving a direct connection request (DCR) message from the first WTRU via a second relay, wherein the DCR message includes the new KNRP ID.